1. Renal Division, Department of Internal Medicine, National Taiwan University Hospital, Taipei City, Taiwan
2. Department of Communication, National Chung Cheng University, Minhsiung, Taiwan
3. Department of Surgery, National Taiwan University Hospital, Taipei City, Taiwan
4. Graduate Institute of Physiology, National Taiwan University College of Medicine, Taipei City, Taiwan
5. National Taiwan University Hospital Bei-Hu Branch, Taipei City, Taiwan